throwaway remark/line/comment etc
From Longman Dictionary of Contemporary Englishthrowaway remark/line/comment etcthrowaway remark/line/comment etc → throwawayExamples from the Corpusthrowaway remark/line/comment etc• Lopez says, a throwaway line for a throwaway job.• He thought the remark was melancholy, sadly philosophical, a throwaway line for an aimless afternoon.